A Tb/s indoor mimo optical wireless backhaul system using VCSEL arrays

Kazemi, Hossein and Sarbazi, Elham and Soltani, Mohammad Dehghani and El-Gorashi, Taisir E. H. and Elmirghani, Jaafar M. H. and Penty, Richard V. and White, Ian H. and Safari, Majid and Haas, Harald (2022) A Tb/s indoor mimo optical wireless backhaul system using VCSEL arrays. IEEE Transactions on Communications, 70 (6). pp. 3995-4012. ISSN 0090-6778 (https://doi.org/10.1109/TCOMM.2022.3165187)

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Abstract

In this paper, the design of a multiple-input multiple-output (MIMO) optical wireless communication (OWC) link based on vertical cavity surface emitting laser (VCSEL) arrays is systematically carried out with the aim to support data rates in excess of 1 Tb/s for the backhaul of sixth generation (6G) indoor wireless networks. The proposed design combines direct current optical orthogonal frequency division multiplexing (DCO-OFDM) and a spatial multiplexing MIMO architecture. For such an ultra-high-speed line-of-sight (LOS) OWC link with low divergence laser beams, maintaining alignment is of high importance. In this paper, two types of misalignment error between the transmitter and receiver are distinguished, namely, radial displacement error and orientation angle error, and they are thoroughly modeled in a unified analytical framework assuming Gaussian laser beams, resulting in a generalized misalignment model (GMM). The derived GMM is then extended to MIMO arrays and the performance of the MIMO-OFDM OWC system is analyzed in terms of the aggregate data rate. Novel insights are provided into the system performance based on computer simulations by studying various influential factors such as beam waist, array configuration and different misalignment errors, which can be used as guidelines for designing short range Tb/s MIMO OWC systems.

ORCID iDs

Kazemi, Hossein, Sarbazi, Elham ORCID logoORCID: https://orcid.org/0000-0002-7506-2666, Soltani, Mohammad Dehghani, El-Gorashi, Taisir E. H., Elmirghani, Jaafar M. H., Penty, Richard V., White, Ian H., Safari, Majid and Haas, Harald;
  • Item type:Article
    ID code:80551
    Dates:
    Date
    Event
    1 June 2022
    Published
    6 April 2022
    Published Online
    25 March 2022
    Accepted
    Notes:© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:04 May 2022 16:04
    Last modified:11 Nov 2024 13:28
    URI:https://strathprints.strath.ac.uk/id/eprint/80551
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